The Washington sextant testing apparatus / by C. Louis Berger ; translated by A.N. Skinner, assisted by E.A. Boeger. 1896.
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Boeger, Ernest A.
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Skinner, Aaron Nichols, 1845-
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Berger, Melyn Louis
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United States. Naval Observatory
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Organizational History 1830 Establishment of the Depot of Charts and Instruments, Washington, D.C. 1843 1844 Construction of the observatory on its present site 1846 Publication of the first ...